An islanding detection method based on system identification

Islanding detection is a crucial technique for distributed generation(DG) system in case that a grid is still energized by DG when it is cut off. In this paper, an islanding detection method based on system identification is proposed. Regarding the grid as a RLC load, a recursive least square(RLS) method is used to obtain estimated parameters of the the equivalent RLC. Different from other system identifications, our algorithm adjusts the traditional RLS, concerning on the tiny change of parameters. Two parameters reflecting the change of the equivalent system are proposed for a decision of whether DG is disconnected from the grid or not. a simulation experiment demonstrates that the algorithm is effective and fast for detecting islanding event.

[1]  T. R. Sims,et al.  Investigation of potential islanding of a self-commutated static power converter in photovoltaic systems , 1990 .

[2]  M. Liserre,et al.  Overview of Anti-Islanding Algorithms for PV Systems. Part I: Passive Methods , 2006, 2006 12th International Power Electronics and Motion Control Conference.

[3]  M. Sumner,et al.  Estimation of power supply harmonic impedance using a controlled voltage disturbance , 2001, 2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230).

[4]  Fuwen Yang,et al.  A novel islanding fault detection for distributed generation systems , 2014 .

[5]  P. Rodriguez,et al.  Online grid impedance estimation for single-phase grid-connected systems using PQ variations , 2007, 2007 IEEE Power Electronics Specialists Conference.

[6]  B. Singam,et al.  Assessing SMS and PJD Schemes of Anti-Islanding with Varying Quality Factor , 2006, 2006 IEEE International Power and Energy Conference.

[7]  Emilio Figueres,et al.  Review of anti-islanding techniques in distributed generators , 2010 .

[8]  Alexandre Oudalov,et al.  Islanding detection in smart grids , 2010, 2010 IEEE Energy Conversion Congress and Exposition.

[9]  P.P. Barker,et al.  Determining the impact of distributed generation on power systems. I. Radial distribution systems , 2000, 2000 Power Engineering Society Summer Meeting (Cat. No.00CH37134).

[10]  Chern-Lin Chen,et al.  Automatic phase-shift method for islanding detection of grid-connected photovoltaic inverters , 2002 .

[11]  Chung-Yuen Won,et al.  An Islanding Detection Method for a Grid-Connected System Based on the Goertzel Algorithm , 2011, IEEE Transactions on Power Electronics.

[12]  Frede Blaabjerg,et al.  Accurate and Less-Disturbing Active Antiislanding Method Based on PLL for Grid-Connected Converters , 2010, IEEE Transactions on Power Electronics.

[13]  Zhe Chen,et al.  Review of islanding detection methods for distributed generation , 2008, 2008 Third International Conference on Electric Utility Deregulation and Restructuring and Power Technologies.

[14]  Miles A Redfern,et al.  Protection against loss of utility grid supply for a dispersed storage and generation unit , 1993 .

[15]  D. A. Balaguera,et al.  Distributed generation scheme analysis, as an option for Bogota electrical system , 2012, 2012 IEEE International Symposium on Alternative Energies and Energy Quality (SIFAE).

[16]  Hans B. Puttgen,et al.  Distributed generation: Semantic hype or the dawn of a new era? , 2003 .

[17]  K. Agbossou,et al.  Modeling of an islanding protection method for a hybrid renewable distributed generator , 2005, Canadian Conference on Electrical and Computer Engineering, 2005..

[18]  R. Iravani,et al.  Negative-Sequence Current Injection for Fast Islanding Detection of a Distributed Resource Unit , 2008, IEEE Transactions on Power Electronics.

[19]  Hannu Laaksonen,et al.  Advanced Islanding Detection Functionality for Future Electricity Distribution Networks , 2013, IEEE Transactions on Power Delivery.

[20]  Bin Wu,et al.  Improved Active Frequency Drift Anti-islanding Detection Method for Grid Connected Photovoltaic Systems , 2012, IEEE Transactions on Power Electronics.

[21]  Jan T. Bialasiewicz,et al.  Power-Electronic Systems for the Grid Integration of Renewable Energy Sources: A Survey , 2006, IEEE Transactions on Industrial Electronics.

[22]  P. Rodriguez,et al.  Line Impedance Estimation Using Active and Reactive Power Variations , 2007, 2007 IEEE Power Electronics Specialists Conference.

[23]  Jie Huang,et al.  Nonlinear Output Regulation: Theory and Applications , 2004 .

[24]  Mehmet Cebeci,et al.  A novel anti islanding detection method for grid connected fuel cell power generation systems , 2014 .

[25]  Sung-Il Jang,et al.  An islanding detection method for distributed generations using voltage unbalance and total harmonic distortion of current , 2004, IEEE Transactions on Power Delivery.

[26]  Mikihiko Matsui,et al.  A review of current anti-islanding methods for photovoltaic power system , 2010 .